EP 4246201 A4 20240522 - LENS ASSEMBLY, IMAGING DEVICE, DETECTION DEVICE, AND DETECTION SYSTEM
Title (en)
LENS ASSEMBLY, IMAGING DEVICE, DETECTION DEVICE, AND DETECTION SYSTEM
Title (de)
LINSENANORDNUNG, BILDGEBUNGSVORRICHTUNG, DETEKTIONSVORRICHTUNG UND DETEKTIONSSYSTEM
Title (fr)
ENSEMBLE LENTILLE, DISPOSITIF D'IMAGERIE, DISPOSITIF DE DÉTECTION ET SYSTÈME DE DÉTECTION
Publication
Application
Priority
- CN 202011275485 A 20201116
- CN 2021118312 W 20210914
Abstract (en)
[origin: EP4246201A1] A lens assembly (10), an imaging device (20), a detection device and a detection system. The lens assembly (10) is applied to a lens, and comprises multiple lens elements (111-114,121-126) sharing an optical axis. An entrance pupil position and a front focal point of the lens assembly (10) are located outside the lens assembly (10) at the object side of the lens assembly (10). An object-side principal point of the lens assembly (10) is located farther from the lens assembly (10) than the front focal point. A corresponding side peripheral imaging expansion angle of the lens assembly (10) satisfies: α = arctan|H/2f|, wherein α denotes the side peripheral imaging expansion angle, 18° ≤ α ≤ 25°, H denotes the height of a corresponding full field of view of the lens assembly (10), f denotes the focal length of the lens assembly (10), and f< 0. A single imaging device (20) comprising the lens assembly (10) can simultaneously perform imaging of a surface of a workpiece facing the imaging device (20) and a side peripheral surface of the workpiece and provide images of better quality.
IPC 8 full level
G02B 13/00 (2006.01); B07C 5/02 (2006.01); B07C 5/342 (2006.01); B07C 5/36 (2006.01); G02B 9/64 (2006.01); G02B 13/24 (2006.01); G02B 15/02 (2006.01); G03B 37/00 (2021.01)
CPC (source: CN EP)
B07C 5/02 (2013.01 - CN); B07C 5/342 (2013.01 - EP); B07C 5/3422 (2013.01 - CN); B07C 5/362 (2013.01 - CN); G02B 9/64 (2013.01 - EP); G02B 13/00 (2013.01 - CN); G02B 13/24 (2013.01 - EP); G02B 15/02 (2013.01 - EP); G03B 37/00 (2013.01 - CN)
Citation (search report)
[IA] CN 107065119 A 20170818 - THE FIRST RES INSTITUTE OF MINISTRY OF PUBLIC SECURITY
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 4246201 A1 20230920; EP 4246201 A4 20240522; CN 112099204 A 20201218; CN 112099204 B 20210309; WO 2022100271 A1 20220519
DOCDB simple family (application)
EP 21890799 A 20210914; CN 202011275485 A 20201116; CN 2021118312 W 20210914